I trying to understand when assigning a PVID number (say 2020) to port 1, 2, 3 does this mean that the exact VLAN’s numbers must be used on these ports?
Example
port1 = Vlan100, Vlan200, Vlan300
port2 = Vlan100, Vlan200, Vlan300
port3 = Vlan100, Vlan200, Vlan300
or could it be
port1 = Vlan100, Vlan200, Vlan300
port2 = Vlan100, Vlan200, Vlan500
port1 = Vlan100, Vlan500, Vlan600
Can someone clarify please as I am confused?
The pvid parameter of an /interface bridge port row is the ID of the VLAN to which the ingress frames which carry either no VLAN tag or the priority-only one (with all VID bits set to 0) should be placed. Frames belonging to that VLAN will be egress tagless on this port.
Which VLANs are permitted on which port is a matter of /interface bridge vlan settings. At each port only one VLAN can be native (untagged), the rest must ingress and egress tagged.
All the above only works if the vlan-filtering parameter of the respective /interface bridge is set to yes. Otherwise the parameter is ignored and no tagging/untagging takes place on the bridge ports.
If I understand correctly then any tagged VLAN can be added to a (PVID 2020) ports,
with untagged vlan’s
(1) is just one untagged vlan per PVID port or could it be more than one
(2) If more than one untagged Vlan is connected to another port that was also using PVID 2020 does it now require a different PVID ID
What is your requirement USE CASE(s)?
Any tagged VLAN can be allowed on any port of a bridge. For some reason, each bridge port must have a PVID assigned, so if you can see none in the configuration, it is 1 (the default, and default values are not shown in /export unless you say /export verbose).
(1) You cannot have more than one untagged VLAN per port because there is no way to decide which of the multiple VIDs to assign to a frame which came tagless from the wire (leaving aside protocol-based VLANs which aren’t implemented except maybe on CRS3xx - there, you can choose the VLAN ID based on ethertype or other protocol identifier in the received frame).
(2) I don’t understand what you mean.